$(function () {
  $("#undel").on("click",function () {
    //eg1
    layer.confirm('是否退出?', { icon: 3, title: '提示' }, function (index) {
      //do something
    if (index !== 0) {
      location.href = "/admin/login.html"
      localStorage.removeItem("token")
    }
      layer.close(index);
    });  
  })
})